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gfx3d: i've realized that the poly sorting must happen after clipping. there is no way to do this now, so to approximate really well, it, we will perspective divide the y values. fixes island of happiness shop menus.

This commit is contained in:
zeromus 2009-07-19 08:23:14 +00:00
parent 119deba104
commit 4a19bac748
1 changed files with 8 additions and 2 deletions
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10
desmume/src/gfx3d.cpp
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@ -2396,15 +2396,21 @@ static void gfx3d_doFlush()
//find the min and max y values for each poly.
//TODO - this could be a small waste of time if we are manual sorting the translucent polys
//TODO - this _MUST_ be moved later in the pipeline, after clipping.
//the w-division here is just an approximation to fix the shop in harvest moon island of happiness
for(int i=0; i<polycount; i++)
{
POLY &poly = polylist->list[i];
float verty = 0.0f;
poly.miny = poly.maxy = vertlist->list[poly.vertIndexes[0]].y;
float verty = vertlist->list[poly.vertIndexes[0]].y;
float vertw = vertlist->list[poly.vertIndexes[0]].w;
verty = (verty+vertw)/(2*vertw);
poly.miny = poly.maxy = (verty+vertw)/(2*vertw);
for(int j=1; j<poly.type; j++)
{
verty = vertlist->list[poly.vertIndexes[j]].y;
vertw = vertlist->list[poly.vertIndexes[j]].w;
verty = (verty+vertw)/(2*vertw);
poly.miny = min(poly.miny, verty);
poly.maxy = max(poly.maxy, verty);
}